One vertex per element, one color per generator, with an edge from x to x·s.
(17,18)(19,28)(20,32)(21,25)(22,27)(23,30)(24,34)(26,36)(29,37)(31,38)(33,41)(35,40)(39,46)(42,44)(43,47)(45,48) involution — undirected(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,19,21,30,22,31,36,46)(18,23,26,28,27,39,25,38)(20,29,33,43,35,45,34,44)(24,37,40,42,41,48,32,47)(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(17,20)(18,24)(19,29)(21,33)(22,35)(23,37)(25,32)(26,40)(27,41)(28,42)(30,43)(31,45)(34,36)(38,47)(39,48)(44,46)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(17,18)(19,23)(20,24)(21,26)(22,27)(25,36)(28,30)(29,37)(31,39)(32,34)(33,40)(35,41)(38,46)(42,43)(44,47)(45,48)(2,8)(6,9)(7,16)(14,15)(17,21,22,36)(18,25,27,26)(19,30,31,46)(20,33,35,34)(23,38,39,28)(24,32,41,40)(29,43,45,44)(37,47,48,42)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.